hvirtual/quicktime/ffmpeg/libavcodec/mpegaudio.h File Reference

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Defines
#define	MPA_FRAME_SIZE   1152
#define	MPA_MAX_CODED_FRAME_SIZE   1792
#define	MPA_MAX_CHANNELS   2
#define	SBLIMIT   32
#define	MPA_STEREO   0
#define	MPA_JSTEREO   1
#define	MPA_DUAL   2
#define	MPA_MONO   3
#define	SAME_HEADER_MASK   (0xffe00000 | (3 << 17) | (0xf << 12) | (3 << 10) | (3 << 19))
Functions
int	l2_select_table (int bitrate, int nb_channels, int freq, int lsf)
int	mpa_decode_header (AVCodecContext *avctx, uint32_t head)
static int	ff_mpa_check_header (uint32_t header)
Variables
const uint16_t	mpa_bitrate_tab [2][3][15]
const uint16_t	mpa_freq_tab [3]
const unsigned char *	alloc_tables [5]
const double	enwindow [512]
const int	sblimit_table [5]
const int	quant_steps [17]
const int	quant_bits [17]
const int32_t	mpa_enwindow [257]

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Detailed Description

mpeg audio declarations for both encoder and decoder.

Definition in file mpegaudio.h.

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Define Documentation

#define MPA_DUAL   2

Definition at line 18 of file mpegaudio.h.

#define MPA_FRAME_SIZE   1152

Definition at line 7 of file mpegaudio.h.

Referenced by decode_frame_mp3on4(), MPA_encode_frame(), and MPA_encode_init().

#define MPA_JSTEREO   1

Definition at line 17 of file mpegaudio.h.

Referenced by mp_decode_layer1(), and mp_decode_layer2().

#define MPA_MAX_CHANNELS   2

Definition at line 12 of file mpegaudio.h.

Referenced by compute_bit_allocation(), decode_frame_mp3on4(), mp_decode_layer1(), mp_decode_layer2(), and MPA_encode_frame().

#define MPA_MAX_CODED_FRAME_SIZE   1792

Definition at line 10 of file mpegaudio.h.

Referenced by decode_frame(), decode_frame_adu(), decode_frame_mp3on4(), MPA_encode_frame(), and mpegaudio_parse().

#define MPA_MONO   3

Definition at line 19 of file mpegaudio.h.

Referenced by decode_header(), and encode_frame().

#define MPA_STEREO   0

Definition at line 16 of file mpegaudio.h.

Referenced by encode_frame().

#define SAME_HEADER_MASK   (0xffe00000 | (3 << 17) | (0xf << 12) | (3 << 10) | (3 << 19))

Definition at line 22 of file mpegaudio.h.

Referenced by decode_frame(), and mpegaudio_parse().

#define SBLIMIT   32

Definition at line 14 of file mpegaudio.h.

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Function Documentation

static int ff_mpa_check_header

(

uint32_t

header

)

[inline, static]

Definition at line 38 of file mpegaudio.h.

Referenced by decode_frame(), decode_frame_adu(), decode_frame_mp3on4(), and mpa_decode_header().

int l2_select_table	(	int	bitrate,
		int	nb_channels,
		int	freq,
		int	lsf
	)

Definition at line 1330 of file mpegaudiodec.c.

Referenced by mp_decode_layer2(), and MPA_encode_init().

int mpa_decode_header	(	AVCodecContext *	avctx,
		uint32_t	head
	)

Definition at line 1227 of file mpegaudiodec.c.

References MPADecodeContext::bit_rate, AVCodecContext::bit_rate, AVCodecContext::channels, decode_header(), ff_mpa_check_header(), MPADecodeContext::frame_size, AVCodecContext::frame_size, MPADecodeContext::layer, MPADecodeContext::lsf, MPADecodeContext::nb_channels, s, s1, MPADecodeContext::sample_rate, AVCodecContext::sample_rate, and AVCodecContext::sub_id.

Referenced by mpegaudio_parse().

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Variable Documentation

const unsigned char* alloc_tables[5]

Definition at line 200 of file mpegaudiodectab.h.

Referenced by decode_slice_header(), mp_decode_layer2(), MPA_encode_init(), and svq3_decode_frame().

const double enwindow[512]

Definition at line 1 of file enwindow.h.

Referenced by WindowFilterSubband().

const uint16_t mpa_bitrate_tab[2][3][15]

Definition at line 6 of file mpegaudiodectab.h.

Referenced by decode_header(), and MPA_encode_init().

const int32_t mpa_enwindow[257]

Definition at line 20 of file mpegaudiodectab.h.

Referenced by ff_mpa_synth_init(), and MPA_encode_init().

const uint16_t mpa_freq_tab[3]

Definition at line 16 of file mpegaudiodectab.h.

Referenced by decode_header(), and MPA_encode_init().

const int quant_bits[17]

Definition at line 69 of file mpegaudiodectab.h.

Referenced by encode_frame(), mp_decode_layer2(), and MPA_encode_init().

const int quant_steps[17]

Definition at line 61 of file mpegaudiodectab.h.

Referenced by encode_frame(), and mp_decode_layer2().

const int sblimit_table[5]

Definition at line 59 of file mpegaudiodectab.h.

Referenced by mp_decode_layer2(), and MPA_encode_init().